Pharmacy calculations worksheet with answers

Free printable Pharmacy calculations worksheet: 6 problems from easy to exam level, with an answer key. Print it or save it as a PDF.

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Name: ____________________ Date: ____________

1.Easy

A solution is 1% w/v. You need 15 mg of the drug. Draw up the volume in the syringe: what volume V is that?

1% w/v15 mg

V = mL

2.Easy

A solution is 0.5% w/v. You need 7 mg of the drug. Draw up the volume in the syringe: what volume V is that?

0.5% w/v7 mg

V = mL

3.Medium

Practice exercise (made-up values, not clinical guidance). A vial contains cefazolin 1000 mg as a powder. The practice label says to add 4.5 mL of sterile water; the powder adds 0.5 mL to the volume. What is the concentration C in mg/mL after reconstitution?

1000 mg4.5 mL+0.5 mL

C = mg/mL

4.Medium

Practice exercise (made-up values, not clinical guidance). A vial contains oxacillin 2000 mg as a powder. The practice label says to add 11.5 mL of sterile water; the powder adds 1 mL to the volume. What is the concentration C in mg/mL after reconstitution?

2000 mg11.5 mL+1 mL

C = mg/mL

5.Hard

A vial holds 1000 mg of powder. You add 4.8 mL of diluent, and the powder adds 0.2 mL of volume. The prescription is 140 mg. Draw up the dose: what volume V do you give?

1000 mg4.8 mL + 0.2 mL140 mg

V = mL

6.Hard

A vial holds 1000 mg of powder. You add 1.5 mL of diluent, and the powder adds 0.5 mL of volume. The prescription is 900 mg. Draw up the dose: what volume V do you give?

1000 mg1.5 mL + 0.5 mL900 mg

V = mL

Answer key

1. V = 1.5 mL
2. V = 1.4 mL
3. C = 200 mg/mL
4. C = 160 mg/mL
5. V = 0.7 mL
6. V = 1.8 mL

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